Discworld 34: Thud! - Terry Pratchett
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Koom Valley? That was where the trolls ambushed the dwarfs, or the dwarfs ambushed the trolls. Anyway, it was far away and a long time ago. But if Commander Sam Vimes of Ankh-Morpork City Watch doesn't solve the case of a murdered dwarf, he could see the whole battle again, fought right outside his office.
